Congrats scared and confused! That is great. I recently made it through my probation 3 months too, so my contract is indefinite now. That means usually if I am let go, I will get severance based on time worked. Here if they fire you they do need to cite a reason, but there is always the blanket "needs of the organization", generally used when a company is having financial problems.

My husband works for a government agency that is having some budget issues. They let an entire department of 20 people go last Friday, with no notice, citing needs of the organization. They qualify for severance, but weren't paid so they are going to have to sue. I guess it is good that most of them are lawyers, since they can help to represent each other in legal actions to get their money, and they can receive whatever money there is in their individual unemployment accounts in the meantime. Still, that is an awful way to treat people, to not give them any warning or time to plan, they were just told not to come back.